DESCRIPTION
The door control receiver is used to receive radio waves relating to the entry functions of the electrical key transmitter sub-assembly. The certification ECU (smart key ECU assembly) decodes the requested electrical key transmitter sub-assembly by identifying a key code based on the radio waves received via the door control receiver. The door control receiver receives a signal from the electrical key transmitter sub-assembly and sends signals to the main body ECU (multiplex network body ECU) through the certification ECU (smart key ECU assembly). The certification ECU (smart key ECU assembly) then sends a command, according to the requested operation, to each ECU (ex. if door lock operation is requested, the certification ECU (smart key ECU assembly) sends a door lock command to the main body ECU (multiplex network body ECU)).
DTC No. |
DTC Detecting Condition |
Trouble Area |
---|---|---|
B1242 |
|
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
(a) Disconnect the door control receiver connector. |
|
(b) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
T24-8 (+5) - T24-12 (GND) |
Engine switch off, all doors closed and electrical key transmitter sub-assembly switch not pressed → electrical key transmitter sub-assembly switch pressed |
Below 1 V → 4.5 to 5.5 V (Pulse generation) |
T24-2 (DATA) - T24-12 (GND) |
Engine switch off |
11 to 14 V pulse generation at regular intervals |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
T24-12 (GND) - Body ground |
Always |
Below 1 Ω |
*a |
Front view of wire harness connector (Door control receiver) |
OK | ![]() |
REPLACE DOOR CONTROL RECEIVER |
|
2. |
CHECK HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)) |
(a) Disconnect the certification ECU (smart key ECU assembly) connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
C28-19 (CSEL) - T24-6 (CSEL) |
Always |
Below 1 Ω |
C28-20 (RDAM) - T24-2 (DATA) |
Always |
Below 1 Ω |
C28-18 (RCO) - T24-8 (+5) |
Always |
Below 1 Ω |
C29-11 (E) - Body ground |
Always |
Below 1 Ω |
T24-12 (GND) - Body ground |
Always |
Below 1 Ω |
C28-19 (CSEL) or T24-6 (CSEL) - Body ground |
Always |
10 kΩ or higher |
C28-22 (RDAM) or T24-2 (DATA) - Body ground |
Always |
10 kΩ or higher |
C28-18 (RCO) or T24-8 (+5) - Body ground |
Always |
10 kΩ or higher |
OK | ![]() |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT FRONT AXLE HUB BEARING
(a) Remove the front wheel.
(b) for 4WD:
(1) Remove the front axle hub grease cap (See page
).
(c) Remove the front disc brake caliper (See page
).
(d) Remove the front disc.
(e) Inspect the axle hub backlash.
(1) Usi ...
Lost Communication with ECM (C1437)
DESCRIPTION
The skid control ECU (brake actuator assembly) receives signals from the ECM
via the CAN communication system.
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
C1437
Lost Communication with ECM
...
Installation
INSTALLATION
PROCEDURE
1. INSTALL FRONT DRIVE SHAFT
(a) Coat the spline of the inboard joint shaft with gear oil.
(b) Align the shaft splines and install the front drive shaft with a brass bar
and hammer.
NOTICE:
Set the snap ring with the opening side facing downward.
Be caref ...